2GRL

Crystal structure of dCT/iCF10 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis for control of conjugation by bacterial pheromone and inhibitor peptides.

Kozlowicz, B.K.Shi, K.Gu, Z.Y.Ohlendorf, D.H.Earhart, C.A.Dunny, G.M.

(2006) Mol Microbiol 62: 958-969

  • DOI: 10.1111/j.1365-2958.2006.05434.x
  • Primary Citation of Related Structures:  
    2GRL, 2GRM

  • PubMed Abstract: 
  • In many bacteria expression of lateral gene transfer and of virulence factors is controlled by cell-cell signalling systems. Molecular interactions of microbial signal molecules with their cognate receptors are not well understood. For the Enterococcus faecalis conjugative plasmid pCF10, the PrgX protein serves as a molecular switch controlling expression of conjugation and virulence genes encoded by the plasmid ...

    In many bacteria expression of lateral gene transfer and of virulence factors is controlled by cell-cell signalling systems. Molecular interactions of microbial signal molecules with their cognate receptors are not well understood. For the Enterococcus faecalis conjugative plasmid pCF10, the PrgX protein serves as a molecular switch controlling expression of conjugation and virulence genes encoded by the plasmid. The induction state of a pCF10-carrying donor cell is determined by the ratio of two signalling peptides, cCF10 pheromone and iCF10 inhibitor. Recent analysis of PrgX/cCF10 interactions suggests a mechanism for conversion to the induced state. However, the means by which iCF10 peptide antagonizes cCF10 activity is unclear, and it has been suggested that inhibitor peptides block import of pheromone peptides. We now show that both of these peptides interact with the same binding pocket of PrgX, but they differentially alter the conformation of the protein and its oligomerization state, resulting in opposing biological activities.


    Organizational Affiliation

    Department of Microbiology, 1460 Mayo Memorial Building, University of Minnesota, Minneapolis, MN 55455, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PrgXA, B, C, D317Enterococcus faecalisMutation(s): 0 
Gene Names: prgXGTI81_15620
UniProt
Find proteins for Q04114 (Enterococcus faecalis)
Explore Q04114 
Go to UniProtKB:  Q04114
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
peptideE7N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.238 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.75α = 90
b = 110.124β = 90
c = 188.599γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
d*TREKdata reduction
EPMRphasing
CNSrefinement
CrystalCleardata reduction
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance